Agent Skills - Using existing and creating new skill in VS Code and GitHub Copilot

Timeline... October 16, 2025 - Anthropic announces Agent Skills. See: https://claude.com/blog/skills December 18, 2025 - Anthropic donates Agent Skills specification as an open standard. See note at top of this page: https://www.anthropic.com/engineering... which takes you to https://agentskills.io/home. GitHub blog also announces it support of this in the "Insiders" build of VS Code (see: https://github.blog/changelog/2025-12...) January 8, 2026 - VS Code announces support for Agent Skills in its "December 2025" release (see: https://code.visualstudio.com/updates...) January 20, 2026 - Vercel releases npx skills CLI and open agent skills ecosystem (directory and leaderboard). See: https://vercel.com/changelog/introduc... and here for the directory itself: https://skills.sh/ Generally speaking, I see Skills as a way to "hire out" to a specialist a task. The determination of which specialist to use can either be requested directly or you can use your tool of choice (the example in the video is I use GitHub Copilot) to automatically determine which skill it should use. Then, your tool of choice (ex. Copilot) will load the rest of the information that the skill provides and use this information to send to your LLM of choice. This skill really can do darn near anything (because it can call scripts as per my previous video:    • .NET - File based apps and Agent Skills  ) To get skills into your tooling of choice (ex. Copilot) there are predefined locations (but are configurable) whereby the GitHub standard is .github / skills. You can also use the previously mentioned npx skills CLI by Vercel to "install" (i.e. copy) the skill into your preferred tooling of choice. For example: npx skills add https://github.com/vercel-labs/agent-... --skill web-design-guidelines These skills are also "stackable" in the sense that your tool of choice (ex. Copilot) may coordinate across multiple skills to accomplish an action. In the video I created, my custom skill request will actually make use of 2 skills to be created. Timestamps 00:00 - Intro and specification info 01:09 - Skills.sh 02:11 - Installing web-design-guidelines 03:44 - Using the newly installed skill 04:50 - Installing skill-creator and using it to create a new skill 07:24 - Using the newly created skill 08:05 - Wrapup